2 * Copyright 2004-2016 The OpenSSL Project Authors. All Rights Reserved.
4 * Licensed under the OpenSSL license (the "License"). You may not use
5 * this file except in compliance with the License. You can obtain a copy
6 * in the file LICENSE in the source distribution or at
7 * https://www.openssl.org/source/license.html
11 * $LP: LPlib/source/LPdir_unix.c,v 1.11 2004/09/23 22:07:22 _cvs_levitte Exp
15 * Copyright (c) 2004, Richard Levitte <richard@levitte.org>
16 * All rights reserved.
18 * Redistribution and use in source and binary forms, with or without
19 * modification, are permitted provided that the following conditions
21 * 1. Redistributions of source code must retain the above copyright
22 * notice, this list of conditions and the following disclaimer.
23 * 2. Redistributions in binary form must reproduce the above copyright
24 * notice, this list of conditions and the following disclaimer in the
25 * documentation and/or other materials provided with the distribution.
27 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
28 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
29 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
30 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
31 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
32 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
33 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
34 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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37 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
44 #include <sys/types.h>
52 * The POSIXly macro for the maximum number of characters in a file path is
53 * NAME_MAX. However, some operating systems use PATH_MAX instead.
54 * Therefore, it seems natural to first check for PATH_MAX and use that, and
55 * if it doesn't exist, use NAME_MAX.
58 # define LP_ENTRY_SIZE PATH_MAX
59 #elif defined(NAME_MAX)
60 # define LP_ENTRY_SIZE NAME_MAX
64 * Of course, there's the possibility that neither PATH_MAX nor NAME_MAX
65 * exist. It's also possible that NAME_MAX exists but is define to a very
66 * small value (HP-UX offers 14), so we need to check if we got a result, and
67 * if it meets a minimum standard, and create or change it if not.
69 #if !defined(LP_ENTRY_SIZE) || LP_ENTRY_SIZE<255
71 # define LP_ENTRY_SIZE 255
74 struct LP_dir_context_st {
76 char entry_name[LP_ENTRY_SIZE + 1];
79 const char *LP_find_file(LP_DIR_CTX **ctx, const char *directory)
81 struct dirent *direntry = NULL;
83 if (ctx == NULL || directory == NULL) {
90 *ctx = malloc(sizeof(**ctx));
95 memset(*ctx, 0, sizeof(**ctx));
97 (*ctx)->dir = opendir(directory);
98 if ((*ctx)->dir == NULL) {
99 int save_errno = errno; /* Probably not needed, but I'm paranoid */
107 direntry = readdir((*ctx)->dir);
108 if (direntry == NULL) {
112 strncpy((*ctx)->entry_name, direntry->d_name,
113 sizeof((*ctx)->entry_name) - 1);
114 (*ctx)->entry_name[sizeof((*ctx)->entry_name) - 1] = '\0';
115 return (*ctx)->entry_name;
118 int LP_find_file_end(LP_DIR_CTX **ctx)
120 if (ctx != NULL && *ctx != NULL) {
121 int ret = closedir((*ctx)->dir);